OreochromisJuvenileLatesChironomidsManLatesCaridinaNiloticaDetritus/PhytoplanktonLake Victoria 1989Figure 31.2. (continued)(b) Food web structure of Lake Victoria after introduction of the Nile Perch, Modified from Leveque (1995).RastrineobolaargenteaZooplankton 1. Examine the food webs for Lake Victoria, East Africa (fig 31.2 a,b) before and after theintroduction of the Nile perch (Leveque 1995). Calculate the mean food chain length, percent oftrophic groups at various levels, and connectance for each food web.OreochromisInsectivorousFishChironomidsChaoborousManPiscivorousFishZooplanktivorousHaplochrominesRastrineobolaZooplanktonDetritus/PhytoplanktonLake Victoria in the 1970sDetritivorousPhytoplanktivorousHaplochrominesFigure 31.2.(a) Food web structure of Lake Victoria before introduction of the Nile Perch. [continued on next page)MolluscivorousFishMolluscs

Food chain length: In a food web, energy as a form of nutrients passes to the top from the base of…

Answered: 1. Examine the food webs for Lake…

1. Examine the food webs for Lake Victoria, East Africa (fig 31.2 a,b) before and after the of the Nile perch (Leveque 1995). Calculate the mean food chain length, p introduction

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter54: Ecosystems And Global Change

Section: Chapter Questions

Problem 1ITD

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Question

Oreochromis
Juvenile
Lates
Chironomids
Man
Lates
Caridina
Nilotica
Detritus/Phytoplankton
Lake Victoria 1989
Figure 31.2. (continued)
(b) Food web structure of Lake Victoria after introduction of the Nile Perch, Modified from Leveque (1995).
Rastrineobola
argentea
Zooplankton

1. Examine the food webs for Lake Victoria, East Africa (fig 31.2 a,b) before and after the
introduction of the Nile perch (Leveque 1995). Calculate the mean food chain length, percent of
trophic groups at various levels, and connectance for each food web.
Oreochromis
Insectivorous
Fish
Chironomids
Chaoborous
Man
Piscivorous
Fish
Zooplanktivorous
Haplochromines
Rastrineobola
Zooplankton
Detritus/Phytoplankton
Lake Victoria in the 1970s
Detritivorous
Phytoplanktivorous
Haplochromines
Figure 31.2.
(a) Food web structure of Lake Victoria before introduction of the Nile Perch. [continued on next page)
Molluscivorous
Fish
Molluscs

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Explanation of Food chain length, Trophic groups and Connectance in food web

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Step 2 Before introduction of Nile perch (Caridina nilotica):

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Step 3: After introduction of Nile perch (Caridina nilotica):

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Step 4 Calculation of food web parameters:

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